/* =============================
   BUTTON STYLES - Complete
============================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
}

/* Primary Button */
.btn.primary {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border-color: var(--btn-primary-border);
}

.btn.primary:hover {
    background: var(--btn-primary-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn.secondary {
    background: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border-color: var(--btn-secondary-border);
}

.btn.secondary:hover {
    background: var(--btn-secondary-bg-hover);
    transform: translateY(-2px);
}

/* Premium Button */
.btn.premium {
    background: var(--btn-premium-bg);
    color: var(--btn-premium-text);
    border-color: var(--btn-premium-border);
}

.btn.premium:hover {
    background: var(--btn-premium-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Disabled Button */
.btn:disabled,
.btn.disabled {
    background: var(--btn-disabled-bg);
    color: var(--btn-disabled-text);
    border-color: var(--btn-disabled-border);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn:disabled:hover,
.btn.disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Button Sizes */
.btn.large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn.small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}